EP0214107A1 - Werkzeug mit bewegbaren Backen, mit einem einstellbaren und zusammenziehbaren Gelenk - Google Patents
Werkzeug mit bewegbaren Backen, mit einem einstellbaren und zusammenziehbaren Gelenk Download PDFInfo
- Publication number
- EP0214107A1 EP0214107A1 EP86830206A EP86830206A EP0214107A1 EP 0214107 A1 EP0214107 A1 EP 0214107A1 EP 86830206 A EP86830206 A EP 86830206A EP 86830206 A EP86830206 A EP 86830206A EP 0214107 A1 EP0214107 A1 EP 0214107A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jaw
- pivot
- collet
- fact
- movable jaw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 210000000080 chela (arthropods) Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000012361 intermediate testing Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/06—Joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B13/00—Hand shears; Scissors
- B26B13/28—Joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B17/00—Hand cutting tools, i.e. with the cutting action actuated by muscle power with two jaws which come into abutting contact
Definitions
- the present invention relates to a movable jaw tool with an adjustably tightenable pivot.
- movable jaw tools are commercially available such as, for example, pincers, scissors, wire cutters, pliers and the like. Many such tools are required to be of high precision, for example, for medical, electronic or dental work, and for such fields of activity it is known that a very high degree of precision is required in order to be able to obtain perfect closure of the jaws, that is not only avoiding unwanted play but, at the same time, having just the right amount of freedom of movement so that a given sensitivity upon actuation of the tool can be obtained.
- the present invention seeks to eliminate the above mentioned disadvantages by providing a movable jaw tool having two jaw members joined by an adjustably tightenable pivot in which the steps required for assembly are very much simplified, and in particular, the need for heat treatment steps for force fitting the pivot is avoided and, further, which has the possibility of adjustment, even subsequently, of the force resisting turning movement acting between the two jaw members as they are opened and closed in use.
- the present invention also seeks to provide a tool which can be mass produced without requiring complex bench work upon assembly, and in which adjustment of the resistance to turning movement between the two jaw members can be effected in a simple and rapid manner.
- such tightening operation is always directly available to the user both when the tool is new and after a certain period of time during which the tool may have been in use.
- a movable jaw tool with an adjustably tightenable pivot comprising a first jaw and a second jaw pivotally connected together by means of a pivot, characterised by the fact that the pivot is formed as a pivot assembly comprising a generally cylindrical pivot body freely engaged in a hole in one of the jaw members of the tool, the pivot body having an enlarged abutment head at one end thereof, and a radially expandable portion at the other, the said radially expandable portion having an outer thread for threaded engagement with a collet engageable in a recess in the other of the jaw members and an inner thread engageable by a screw element for effecting radial expansion of the said expandable portion whereby to lock the pivot body against turning with respect to the collet.
- a particular advantage of the present invention is that it provides a tool which can be produced with drastically reduced manufacturing and assembly costs due to the shorter time needed for the various operations, leading to a product with significantly improved characteristics being obtained.
- Another advantage of the present invention is that it provides a tool the individual component elements of which can for the most part be made using automatic machines and, consequently, at a particularly advantageous cost.
- a further advantage of the present invention is that it provides a tool which, by its particular constructional characteristics, is able to offer the widest guarantees of reliability and safety in use.
- the tool illustrated is generally indicated with the reference numeral 1 and comprises a first movable jaw member 2 and a second movable jaw member 3, these jaw members being pivoted together by means of the pivot assembly generally indicated with the reference numeral 4.
- the tool shown is a precision side cutter.
- the invention is equally applicable to all other jaw-type tools such as scissors, pliers, pincers, forceps or the like, the relevant criteria which must be taken into account being the available movement between two pivoted jaw-like members, and for this purpose the blades of a pair of scissors, shears or wire cutters will be considered as jaw members for the purpose of the present specification.
- the pivot assembly 4 includes a pivot body 7 having at one end an abutment head 5 with a frusto-conical surface, provided with a slot 6 for engagement of a screwdriver or like tool.
- the head is formed at one end of a cylindrical pivot body 7 which can be introduced into a preformed hole 8 in one of the two jaw members; in the example illustrated this being the jaw 2.
- the cylindrical pivot body 7 has at its free end a radially expandable portion constituted by four sectors 10 separated by radial slots 11. Although four such sectors and slots are shown in the embodiment, disposed diametrically opposite one another in orthogonal pairs, there could readily be provided a different number (either more or less) without altering the way in which the tool performs.
- the radially expandable portion of the pivot body constituted by the sectors 10, has on its outer surface a thread 12 which can be engaged by an internal thread 13 of a threaded ring 14 or collet having a conical end surface 15 for engagement in a correspondingly conically shaped seat 16 formed on the other of the two jaw members, namely the jaw member 3.
- the threaded ring or collet 14 is provided with two diametrically opposite radial slots 17 which can be engaged by a specially shaped screwdriver or like tool for the purpose of turning it with respect to the outer threading 12 on the pivot body, whereby effectively to press the two jaw members 2 and 3 together until the required force between them has been achieved, thereby setting the desired resistance to rotation between the two jaw members 2 and 3.
- a threaded collet 14a is provided around its periphery with splines 15a or other surface working for engagement with a correspondingly splined recess 16a provided in the jaw member 3 so as to obtain a forced locking of the ring nut 14a in the jaw 3 enabling tightening of the pivot assembly 4 in an entirely similar manner to that described above be obtained by turning the pivot body 7 by the head 5 to screw it into the collet 14a by engagement of a screw driver or other tool into the slot 6 in the said head 5 of the pivot body 7.
- a screw element 20 provided with a threaded shank 21 and a conical head 24, which can be engaged with an internal thread 22 formed in the radially expandable portion 10 of the pivot body 7.
- the conical head 24 of the screw 20 can be engaged into a conically flared end portion 25 formed in the expandable portion of the pivot body 7 in such a way that upon clamping of the screw element 20 radial expansion of the sectors 10 is obtained with consequent clamping of the pivot assembly 4 with respect to the collet nut 14 or 14a.
- the pivot body 4 because of its engagement with the collet 14 or 14a, determines the force between the jaw members 2 and 3, whilst the locking of the pivot assembly in the desired adjustment is effected by means of the screw 20 which, by causing radial expansion of the sectors 10, causes them to clamp the pivot body 7 tightly to the collet 14 or 14a.
- the present invention thus provides a tool of high precision which can be obtained using only simple working techniques in that the pivot assembly is fitted by screwing, and locked in a stable manner with respect to one of the jaws by acting on a screw element. Moreover, the many working stages currently utilised in the production of tools of this type known in the art are entirely eliminated and the expensive coupling and interference fit obtained by heat treatment are likewise unnecessary.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT8521679A IT1208561B (it) | 1985-07-23 | 1985-07-23 | Utensile a ganasce mobili con perno di incernieramento regolabile. |
| IT2167985 | 1985-07-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0214107A1 true EP0214107A1 (de) | 1987-03-11 |
Family
ID=11185280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86830206A Withdrawn EP0214107A1 (de) | 1985-07-23 | 1986-07-17 | Werkzeug mit bewegbaren Backen, mit einem einstellbaren und zusammenziehbaren Gelenk |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0214107A1 (de) |
| IT (1) | IT1208561B (de) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220856A (en) * | 1991-05-07 | 1993-06-22 | Snap-On Tools Corporation | Pivotal hand tool and pivot joint therefor |
| DE10061456A1 (de) * | 2000-12-09 | 2002-06-13 | Wella Ag | Schere, insbesondere Friseurschere |
| GB2383290A (en) * | 2001-10-23 | 2003-06-25 | Fever Ind Co Ltd | Pliers having ratchet fastening mechanism |
| EP3070346A1 (de) * | 2015-03-19 | 2016-09-21 | Fiskars Finland Oy Ab | Verbindungsstelle |
| CN109964674A (zh) * | 2017-12-28 | 2019-07-05 | 天津市天龙得冷成型部件有限公司 | 防水园林剪刀用剪刀轴 |
| EP4461481A1 (de) * | 2023-05-09 | 2024-11-13 | Campagnola - Societa' A Responsabilita' Limitata | Verriegelungsanordnung für klingen für motorisierte schere und zugehörige motorisierte schere |
| WO2025017464A1 (en) * | 2023-07-17 | 2025-01-23 | Cilag Gmbh International | Clamp arm of surgical instrument with adjustable coupling stability and related methods |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US624175A (en) * | 1899-05-02 | Joint for shears | ||
| US793402A (en) * | 1905-03-17 | 1905-06-27 | W H Compton Shear Company | Shears. |
| CH573288A5 (en) * | 1973-10-09 | 1976-03-15 | Erem Sa | Adjustable hinge assembly for pliers or scissors - with split taper mounted bush housing taper headed bolt |
-
1985
- 1985-07-23 IT IT8521679A patent/IT1208561B/it active
-
1986
- 1986-07-17 EP EP86830206A patent/EP0214107A1/de not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US624175A (en) * | 1899-05-02 | Joint for shears | ||
| US793402A (en) * | 1905-03-17 | 1905-06-27 | W H Compton Shear Company | Shears. |
| CH573288A5 (en) * | 1973-10-09 | 1976-03-15 | Erem Sa | Adjustable hinge assembly for pliers or scissors - with split taper mounted bush housing taper headed bolt |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220856A (en) * | 1991-05-07 | 1993-06-22 | Snap-On Tools Corporation | Pivotal hand tool and pivot joint therefor |
| DE10061456A1 (de) * | 2000-12-09 | 2002-06-13 | Wella Ag | Schere, insbesondere Friseurschere |
| GB2383290A (en) * | 2001-10-23 | 2003-06-25 | Fever Ind Co Ltd | Pliers having ratchet fastening mechanism |
| EP3070346A1 (de) * | 2015-03-19 | 2016-09-21 | Fiskars Finland Oy Ab | Verbindungsstelle |
| US9757867B2 (en) | 2015-03-19 | 2017-09-12 | Fiskars Finland Oy Ab | Joint |
| CN109964674A (zh) * | 2017-12-28 | 2019-07-05 | 天津市天龙得冷成型部件有限公司 | 防水园林剪刀用剪刀轴 |
| EP4461481A1 (de) * | 2023-05-09 | 2024-11-13 | Campagnola - Societa' A Responsabilita' Limitata | Verriegelungsanordnung für klingen für motorisierte schere und zugehörige motorisierte schere |
| WO2025017464A1 (en) * | 2023-07-17 | 2025-01-23 | Cilag Gmbh International | Clamp arm of surgical instrument with adjustable coupling stability and related methods |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1208561B (it) | 1989-07-10 |
| IT8521679A0 (it) | 1985-07-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI NL SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19880219 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: DE MOLLI, ROMEO |